$ git clone -n https://src.fedoraproject.org/rpms/ghc-vector-algorithms.git /var/lib/mock/f38-build-side-42-init-devel-615213-26314/root/chroot_tmpdir/scmroot/ghc-vector-algorithms
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-615213-26314/root/chroot_tmpdir/scmroot/ghc-vector-algorithms'...
$ git fetch origin 7e81e99565d06d8d8dc877a7f024255b92f86f56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-vector-algorithms
 * [new ref]         7e81e99565d06d8d8dc877a7f024255b92f86f56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e81e99 Convert to %autorelease and %autochangelog