$ git clone -n https://src.fedoraproject.org/rpms/jFormatString.git /var/lib/mock/f40-build-2600677-63145/root/chroot_tmpdir/scmroot/jFormatString
Cloning into '/var/lib/mock/f40-build-2600677-63145/root/chroot_tmpdir/scmroot/jFormatString'...
$ git fetch origin 1ceb72025b9bd3f43f7eea9d47ee1347f37e7edf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jFormatString
 * [new ref]         1ceb72025b9bd3f43f7eea9d47ee1347f37e7edf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ceb720 Bumped release