$ git clone -n https://src.fedoraproject.org/rpms/perl-MooseX-SingleArg.git /var/lib/mock/f45-build-25132-609/root/chroot_tmpdir/scmroot/perl-MooseX-SingleArg
Cloning into '/var/lib/mock/f45-build-25132-609/root/chroot_tmpdir/scmroot/perl-MooseX-SingleArg'...
$ git fetch origin ce53a53eb6f5e5f62c0b7a181909cb4b6fda1da9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MooseX-SingleArg
 * [new ref]         ce53a53eb6f5e5f62c0b7a181909cb4b6fda1da9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce53a53 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild