$ git clone -n https://src.fedoraproject.org/rpms/snapper.git /var/lib/mock/f45-build-36158-701/root/chroot_tmpdir/scmroot/snapper
Cloning into '/var/lib/mock/f45-build-36158-701/root/chroot_tmpdir/scmroot/snapper'...
$ git fetch origin 2f66fe3ecbac366426199c2ccde5362abf336a2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/snapper
 * [new ref]         2f66fe3ecbac366426199c2ccde5362abf336a2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f66fe3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild