$ git clone -n https://src.fedoraproject.org/rpms/ghc-semigroupoids.git /var/lib/mock/f38-build-side-42-init-devel-1051377-29762/root/chroot_tmpdir/scmroot/ghc-semigroupoids
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1051377-29762/root/chroot_tmpdir/scmroot/ghc-semigroupoids'...
$ git fetch origin 9df6c209ff84929524a7dc066888e9b467dc5de3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-semigroupoids
 * [new ref]         9df6c209ff84929524a7dc066888e9b467dc5de3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9df6c20 Convert to %autorelease and %autochangelog