$ git clone -n https://src.fedoraproject.org/rpms/algol68g.git /var/lib/mock/f41-build-side-1-3129358-39577/root/chroot_tmpdir/scmroot/algol68g
Cloning into '/var/lib/mock/f41-build-side-1-3129358-39577/root/chroot_tmpdir/scmroot/algol68g'...
$ git fetch origin ded07836c0966e2ec6fa88425c9489b912baf5be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/algol68g
 * [new ref]         ded07836c0966e2ec6fa88425c9489b912baf5be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ded0783 Update to 3.5.9