$ git clone -n https://src.fedoraproject.org/rpms/python-jupymake.git /var/lib/mock/f40-build-800318-142896/root/chroot_tmpdir/scmroot/python-jupymake
Cloning into '/var/lib/mock/f40-build-800318-142896/root/chroot_tmpdir/scmroot/python-jupymake'...
$ git fetch origin fb545661d793e00dcfd43d81527fa2f265b1dabd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jupymake
 * [new ref]         fb545661d793e00dcfd43d81527fa2f265b1dabd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb54566 Switch to new git repository