$ git clone -n https://src.fedoraproject.org/rpms/perl-Carp-Clan-Share.git /var/lib/mock/f45-build-22230-590/root/chroot_tmpdir/scmroot/perl-Carp-Clan-Share
Cloning into '/var/lib/mock/f45-build-22230-590/root/chroot_tmpdir/scmroot/perl-Carp-Clan-Share'...
$ git fetch origin 2d827f5e3265e550561d3205e456ab93e435e25a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Carp-Clan-Share
 * [new ref]         2d827f5e3265e550561d3205e456ab93e435e25a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d827f5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild