$ git clone -n https://src.fedoraproject.org/rpms/unifdef.git /var/lib/mock/f45-build-37698-717/root/chroot_tmpdir/scmroot/unifdef
Cloning into '/var/lib/mock/f45-build-37698-717/root/chroot_tmpdir/scmroot/unifdef'...
$ git fetch origin 36488bf88c3ae4296162a46461de7d1282e35328:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unifdef
 * [new ref]         36488bf88c3ae4296162a46461de7d1282e35328 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36488bf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild