$ git clone -n https://src.fedoraproject.org/rpms/perl-String-Dirify.git /var/lib/mock/f45-build-26285-616/root/chroot_tmpdir/scmroot/perl-String-Dirify
Cloning into '/var/lib/mock/f45-build-26285-616/root/chroot_tmpdir/scmroot/perl-String-Dirify'...
$ git fetch origin 94e1a6ab71c5a74a241dbe60d545b378be27d254:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-String-Dirify
 * [new ref]         94e1a6ab71c5a74a241dbe60d545b378be27d254 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94e1a6a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild