$ git clone -n https://src.fedoraproject.org/rpms/ghc-date-cache.git /var/lib/mock/f38-build-side-42-init-devel-777763-27877/root/chroot_tmpdir/scmroot/ghc-date-cache
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-777763-27877/root/chroot_tmpdir/scmroot/ghc-date-cache'...
$ git fetch origin 7e3224f3f7c120434185aab2d9cf20ad5219b22e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-date-cache
 * [new ref]         7e3224f3f7c120434185aab2d9cf20ad5219b22e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e3224f Convert to %autorelease and %autochangelog