$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_readlink.git /var/lib/mock/f41-build-810926-146985/root/chroot_tmpdir/scmroot/rust-uu_readlink
Cloning into '/var/lib/mock/f41-build-810926-146985/root/chroot_tmpdir/scmroot/rust-uu_readlink'...
$ git fetch origin 056287b6c99741ca88c480f8d2f5ddedd2c2ba3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_readlink
 * [new ref]         056287b6c99741ca88c480f8d2f5ddedd2c2ba3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 056287b Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces