$ git clone -n https://src.fedoraproject.org/rpms/ghc-file-embed.git /var/lib/mock/f38-build-side-42-init-devel-1020542-29635/root/chroot_tmpdir/scmroot/ghc-file-embed
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1020542-29635/root/chroot_tmpdir/scmroot/ghc-file-embed'...
$ git fetch origin c931e65fb4e1543cc89988c6ef8036dbc1290334:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-file-embed
 * [new ref]         c931e65fb4e1543cc89988c6ef8036dbc1290334 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c931e65 Convert to %autorelease and %autochangelog