$ git clone -n https://src.fedoraproject.org/rpms/libgravatar.git /var/lib/mock/f45-build-16276-484/root/chroot_tmpdir/scmroot/libgravatar
Cloning into '/var/lib/mock/f45-build-16276-484/root/chroot_tmpdir/scmroot/libgravatar'...
$ git fetch origin 34d2aee9a1b09c68472e97ee12ffcd8ad813ad6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgravatar
 * [new ref]         34d2aee9a1b09c68472e97ee12ffcd8ad813ad6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34d2aee 26.08.1