$ git clone -n https://src.fedoraproject.org/rpms/PyMca.git /var/lib/mock/f39-build-1845193-42081/root/chroot_tmpdir/scmroot/PyMca
Cloning into '/var/lib/mock/f39-build-1845193-42081/root/chroot_tmpdir/scmroot/PyMca'...
$ git fetch origin 6b2f96abc7ae8aae41fec51dfd561fb79e6af955:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/PyMca
 * [new ref]         6b2f96abc7ae8aae41fec51dfd561fb79e6af955 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b2f96a Convert license tag to SPDX