$ git clone -n https://src.fedoraproject.org/rpms/vgrep.git /var/lib/mock/f38-build-side-42-init-devel-933189-28750/root/chroot_tmpdir/scmroot/vgrep
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-933189-28750/root/chroot_tmpdir/scmroot/vgrep'...
$ git fetch origin d1d956e7f40e9f838d4a421279705c9601eb96cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vgrep
 * [new ref]         d1d956e7f40e9f838d4a421279705c9601eb96cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1d956e Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild