$ git clone -n https://src.fedoraproject.org/rpms/perl-Catalyst-Plugin-Session.git /var/lib/mock/f45-build-22177-590/root/chroot_tmpdir/scmroot/perl-Catalyst-Plugin-Session
Cloning into '/var/lib/mock/f45-build-22177-590/root/chroot_tmpdir/scmroot/perl-Catalyst-Plugin-Session'...
$ git fetch origin 0406e56856c5444119e0d3c0d3e6a6d69051626d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Catalyst-Plugin-Session
 * [new ref]         0406e56856c5444119e0d3c0d3e6a6d69051626d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0406e56 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild