$ git clone -n https://src.fedoraproject.org/rpms/python-mathics-scanner.git /var/lib/mock/f39-build-1581935-38099/root/chroot_tmpdir/scmroot/python-mathics-scanner
Cloning into '/var/lib/mock/f39-build-1581935-38099/root/chroot_tmpdir/scmroot/python-mathics-scanner'...
$ git fetch origin a9095d9f19dd133c0cb57290b495a9b6b9a7cac0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mathics-scanner
 * [new ref]         a9095d9f19dd133c0cb57290b495a9b6b9a7cac0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9095d9 Update to 1.3.0