$ git clone -n https://src.fedoraproject.org/rpms/ghc-binary-shared.git /var/lib/mock/f38-build-side-42-init-devel-673515-26681/root/chroot_tmpdir/scmroot/ghc-binary-shared
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-673515-26681/root/chroot_tmpdir/scmroot/ghc-binary-shared'...
$ git fetch origin 2f7ea7e70b47f7bcbf0ee0230b0bbfe2cb306afa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-binary-shared
 * [new ref]         2f7ea7e70b47f7bcbf0ee0230b0bbfe2cb306afa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f7ea7e Convert to %autorelease and %autochangelog