$ git clone -n https://src.fedoraproject.org/rpms/ghc-modern-uri.git /var/lib/mock/f38-build-side-42-init-devel-711832-27249/root/chroot_tmpdir/scmroot/ghc-modern-uri
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-711832-27249/root/chroot_tmpdir/scmroot/ghc-modern-uri'...
$ git fetch origin fcc1c11a91bce6e554becae5881ffe16bf0d582c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-modern-uri
 * [new ref]         fcc1c11a91bce6e554becae5881ffe16bf0d582c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcc1c11 Convert to %autorelease and %autochangelog