$ git clone -n https://src.fedoraproject.org/rpms/mint-themes.git /var/lib/mock/f45-build-18903-534/root/chroot_tmpdir/scmroot/mint-themes
Cloning into '/var/lib/mock/f45-build-18903-534/root/chroot_tmpdir/scmroot/mint-themes'...
$ git fetch origin 85847693b0e58e918c4fb2667e6fac287a466aaf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mint-themes
 * [new ref]         85847693b0e58e918c4fb2667e6fac287a466aaf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8584769 Update to 2.4.0