$ git clone -n https://src.fedoraproject.org/rpms/ghc-filestore.git /var/lib/mock/f38-build-side-42-init-devel-567435-25903/root/chroot_tmpdir/scmroot/ghc-filestore
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-567435-25903/root/chroot_tmpdir/scmroot/ghc-filestore'...
$ git fetch origin 29c4f96ceb6b58d871055b77078cbfa6cf707bcf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-filestore
 * [new ref]         29c4f96ceb6b58d871055b77078cbfa6cf707bcf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29c4f96 Convert to %autorelease and %autochangelog