$ git clone -n https://src.fedoraproject.org/rpms/ghc-rpm-nvr.git /var/lib/mock/f38-build-side-42-init-devel-913203-28703/root/chroot_tmpdir/scmroot/ghc-rpm-nvr
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-913203-28703/root/chroot_tmpdir/scmroot/ghc-rpm-nvr'...
$ git fetch origin 71031ab6eb40b19636388d6e9a5e3a7b1fb396b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-rpm-nvr
 * [new ref]         71031ab6eb40b19636388d6e9a5e3a7b1fb396b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71031ab Convert to %autorelease and %autochangelog