$ git clone -n https://src.fedoraproject.org/rpms/jd.git /var/lib/mock/f39-build-1561551-37392/root/chroot_tmpdir/scmroot/jd
Cloning into '/var/lib/mock/f39-build-1561551-37392/root/chroot_tmpdir/scmroot/jd'...
$ git fetch origin 26a61a7e5d239f1b557f766623d97eb5e0e7ceb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jd
 * [new ref]         26a61a7e5d239f1b557f766623d97eb5e0e7ceb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26a61a7 0.10.1