$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_printenv.git /var/lib/mock/f41-build-810930-146988/root/chroot_tmpdir/scmroot/rust-uu_printenv
Cloning into '/var/lib/mock/f41-build-810930-146988/root/chroot_tmpdir/scmroot/rust-uu_printenv'...
$ git fetch origin 71ceb9f188f78b2c54dba8ebfb9c0235c5d1660f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_printenv
 * [new ref]         71ceb9f188f78b2c54dba8ebfb9c0235c5d1660f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71ceb9f Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces