$ git clone -n https://src.fedoraproject.org/rpms/ginac.git /var/lib/mock/f39-build-2117318-50720/root/chroot_tmpdir/scmroot/ginac
Cloning into '/var/lib/mock/f39-build-2117318-50720/root/chroot_tmpdir/scmroot/ginac'...
$ git fetch origin 701249a9901f474f4e987eeee506bb39d6b6ab84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ginac
 * [new ref]         701249a9901f474f4e987eeee506bb39d6b6ab84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 701249a Convert license tag to SPDX