$ git clone -n https://src.fedoraproject.org/rpms/PyMca.git /var/lib/mock/f41-build-814030-148849/root/chroot_tmpdir/scmroot/PyMca
Cloning into '/var/lib/mock/f41-build-814030-148849/root/chroot_tmpdir/scmroot/PyMca'...
$ git fetch origin f254679a023e449985e66c3930bfa23e309fe6e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/PyMca
 * [new ref]         f254679a023e449985e66c3930bfa23e309fe6e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f254679 Version 5.9.3