$ git clone -n https://src.fedoraproject.org/rpms/unifdef.git /var/lib/mock/f42-build-3494567-45873/root/chroot_tmpdir/scmroot/unifdef
Cloning into '/var/lib/mock/f42-build-3494567-45873/root/chroot_tmpdir/scmroot/unifdef'...
$ git fetch origin fa6b7323e567fc0799d03acdb1b748a9f4ab917c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unifdef
 * [new ref]         fa6b7323e567fc0799d03acdb1b748a9f4ab917c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa6b732 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild