$ git clone -n https://src.fedoraproject.org/rpms/perl-Set-Crontab.git /var/lib/mock/f45-build-26195-616/root/chroot_tmpdir/scmroot/perl-Set-Crontab
Cloning into '/var/lib/mock/f45-build-26195-616/root/chroot_tmpdir/scmroot/perl-Set-Crontab'...
$ git fetch origin 502af7590b443a26144fb493e3a6956558f11067:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Set-Crontab
 * [new ref]         502af7590b443a26144fb493e3a6956558f11067 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 502af75 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild