$ git clone -n https://src.fedoraproject.org/rpms/perl-Catalyst-Devel.git /var/lib/mock/f45-build-22206-590/root/chroot_tmpdir/scmroot/perl-Catalyst-Devel
Cloning into '/var/lib/mock/f45-build-22206-590/root/chroot_tmpdir/scmroot/perl-Catalyst-Devel'...
$ git fetch origin 9a87b68b6cb273e77bcbb2118558de8fe443ce01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Catalyst-Devel
 * [new ref]         9a87b68b6cb273e77bcbb2118558de8fe443ce01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a87b68 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild