$ git clone -n https://src.fedoraproject.org/rpms/qmapshack.git /var/lib/mock/f41-build-812170-147723/root/chroot_tmpdir/scmroot/qmapshack
Cloning into '/var/lib/mock/f41-build-812170-147723/root/chroot_tmpdir/scmroot/qmapshack'...
$ git fetch origin 8dec7aecadc8d5532833cece741510283525552a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qmapshack
 * [new ref]         8dec7aecadc8d5532833cece741510283525552a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8dec7ae Rebuild (alglib)