$ git clone -n https://src.fedoraproject.org/rpms/perl-Best.git /var/lib/mock/f45-build-21882-588/root/chroot_tmpdir/scmroot/perl-Best
Cloning into '/var/lib/mock/f45-build-21882-588/root/chroot_tmpdir/scmroot/perl-Best'...
$ git fetch origin a3f10f34c35e6375e610eeff362fcf79db57fb84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Best
 * [new ref]         a3f10f34c35e6375e610eeff362fcf79db57fb84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3f10f3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild