$ git clone -n https://src.fedoraproject.org/rpms/ghc-spdx.git /var/lib/mock/f38-build-side-42-init-devel-1007603-29378/root/chroot_tmpdir/scmroot/ghc-spdx
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1007603-29378/root/chroot_tmpdir/scmroot/ghc-spdx'...
$ git fetch origin 02a1bb8498a08f4bc91f608fdb562df0e9ceee50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-spdx
 * [new ref]         02a1bb8498a08f4bc91f608fdb562df0e9ceee50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02a1bb8 set %autorelease baserelease