$ git clone -n https://src.fedoraproject.org/rpms/genchemlab.git /var/lib/mock/f38-build-711571-93956/root/chroot_tmpdir/scmroot/genchemlab
Cloning into '/var/lib/mock/f38-build-711571-93956/root/chroot_tmpdir/scmroot/genchemlab'...
$ git fetch origin f367eaf935d4af91ad83e3a63a2dbbfb4a616cb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/genchemlab
 * [new ref]         f367eaf935d4af91ad83e3a63a2dbbfb4a616cb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f367eaf Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild