$ git clone -n https://src.fedoraproject.org/rpms/perl-MooseX-SetOnce.git /var/lib/mock/f45-build-25129-609/root/chroot_tmpdir/scmroot/perl-MooseX-SetOnce
Cloning into '/var/lib/mock/f45-build-25129-609/root/chroot_tmpdir/scmroot/perl-MooseX-SetOnce'...
$ git fetch origin 0c93a94dbb3365ed0a1f2d74240771c7eb1547d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MooseX-SetOnce
 * [new ref]         0c93a94dbb3365ed0a1f2d74240771c7eb1547d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c93a94 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild