$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-Reform.git /var/lib/mock/f45-build-27074-620/root/chroot_tmpdir/scmroot/perl-Text-Reform
Cloning into '/var/lib/mock/f45-build-27074-620/root/chroot_tmpdir/scmroot/perl-Text-Reform'...
$ git fetch origin 31abd5d2d7b9ea9d75f8987e22764e0fc6fa33ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-Reform
 * [new ref]         31abd5d2d7b9ea9d75f8987e22764e0fc6fa33ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31abd5d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild