$ git clone -n https://src.fedoraproject.org/rpms/msgraph.git /var/lib/mock/f42-build-side-1-3502107-45977/root/chroot_tmpdir/scmroot/msgraph
Cloning into '/var/lib/mock/f42-build-side-1-3502107-45977/root/chroot_tmpdir/scmroot/msgraph'...
$ git fetch origin 7ac646c56cddcfe763bd4472ebf08cf2d0fcc01b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/msgraph
 * [new ref]         7ac646c56cddcfe763bd4472ebf08cf2d0fcc01b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ac646c Rebuilt against a side tag