$ git clone -n https://src.fedoraproject.org/rpms/marshalparser.git /var/lib/mock/f41-build-side-1-3131118-39608/root/chroot_tmpdir/scmroot/marshalparser
Cloning into '/var/lib/mock/f41-build-side-1-3131118-39608/root/chroot_tmpdir/scmroot/marshalparser'...
$ git fetch origin f2f041328d629719c5ff31a08e800638d5df497f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/marshalparser
 * [new ref]         f2f041328d629719c5ff31a08e800638d5df497f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2f0413 Improve testing during RPM build