$ git clone -n https://src.fedoraproject.org/rpms/qpid-proton.git /var/lib/mock/f45-build-33991-676/root/chroot_tmpdir/scmroot/qpid-proton
Cloning into '/var/lib/mock/f45-build-33991-676/root/chroot_tmpdir/scmroot/qpid-proton'...
$ git fetch origin 75ab6210bbd0bed6b3478b3802a12998a06fbbf9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qpid-proton
 * [new ref]         75ab6210bbd0bed6b3478b3802a12998a06fbbf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75ab621 Fix EPEL build by yselkowitz