$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_whoami.git /var/lib/mock/f40-build-779933-130551/root/chroot_tmpdir/scmroot/rust-uu_whoami
Cloning into '/var/lib/mock/f40-build-779933-130551/root/chroot_tmpdir/scmroot/rust-uu_whoami'...
$ git fetch origin 3a0695f3bd0b1fde937b0a581772bf40557d5257:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_whoami
 * [new ref]         3a0695f3bd0b1fde937b0a581772bf40557d5257 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a0695f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild