$ git clone -n https://src.fedoraproject.org/rpms/dev86.git /var/lib/mock/f40-build-2207607-52086/root/chroot_tmpdir/scmroot/dev86
Cloning into '/var/lib/mock/f40-build-2207607-52086/root/chroot_tmpdir/scmroot/dev86'...
$ git fetch origin cc261cf26c087b4f76a29fdde7231f9b6fb37ddb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dev86
 * [new ref]         cc261cf26c087b4f76a29fdde7231f9b6fb37ddb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc261cf Set build_type_safety_c to 0 (#2167300)