$ git clone -n https://src.fedoraproject.org/rpms/perl-Carp-Clan.git /var/lib/mock/f45-build-22167-590/root/chroot_tmpdir/scmroot/perl-Carp-Clan
Cloning into '/var/lib/mock/f45-build-22167-590/root/chroot_tmpdir/scmroot/perl-Carp-Clan'...
$ git fetch origin 1ffc435d70a53ef7907645f0f0943780ab77c0fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Carp-Clan
 * [new ref]         1ffc435d70a53ef7907645f0f0943780ab77c0fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ffc435 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild