$ git clone -n https://src.fedoraproject.org/rpms/doctest.git /var/lib/mock/f40-build-2196263-51564/root/chroot_tmpdir/scmroot/doctest
Cloning into '/var/lib/mock/f40-build-2196263-51564/root/chroot_tmpdir/scmroot/doctest'...
$ git fetch origin ca7a2c31ef3c8968007ebeb086debab6b59ee1e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/doctest
 * [new ref]         ca7a2c31ef3c8968007ebeb086debab6b59ee1e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca7a2c3 Migrate to SPDX license