$ git clone -n https://src.fedoraproject.org/rpms/perl-Mock-Quick.git /var/lib/mock/f45-build-24766-606/root/chroot_tmpdir/scmroot/perl-Mock-Quick
Cloning into '/var/lib/mock/f45-build-24766-606/root/chroot_tmpdir/scmroot/perl-Mock-Quick'...
$ git fetch origin 30387bc1f2f9b03c6670c00fe66e2c281501b045:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Mock-Quick
 * [new ref]         30387bc1f2f9b03c6670c00fe66e2c281501b045 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30387bc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild