$ git clone -n https://src.fedoraproject.org/rpms/golang-github-cpuguy83-md2man-epel.git /var/lib/mock/f40-build-2573781-62241/root/chroot_tmpdir/scmroot/golang-github-cpuguy83-md2man-epel
Cloning into '/var/lib/mock/f40-build-2573781-62241/root/chroot_tmpdir/scmroot/golang-github-cpuguy83-md2man-epel'...
$ git fetch origin 064f186e369eff62a35706377e096020fe53f93a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-cpuguy83-md2man-epel
 * [new ref]         064f186e369eff62a35706377e096020fe53f93a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 064f186 EPEL-only package