$ git clone -n https://src.fedoraproject.org/rpms/ghc-X11.git /var/lib/mock/f38-build-side-42-init-devel-870924-28444/root/chroot_tmpdir/scmroot/ghc-X11
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-870924-28444/root/chroot_tmpdir/scmroot/ghc-X11'...
$ git fetch origin f6ff88c975c699f3091c650177936bd414af1cb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-X11
 * [new ref]         f6ff88c975c699f3091c650177936bd414af1cb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6ff88c Convert to %autorelease and %autochangelog