$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-HStringTemplate.git /var/lib/mock/f39-build-2227531-53024/root/chroot_tmpdir/scmroot/ghc-HStringTemplate
Cloning into '/var/lib/mock/f39-build-2227531-53024/root/chroot_tmpdir/scmroot/ghc-HStringTemplate'...
$ git fetch origin a56f6c9ec91f8dd9f7fbfc1e9a1a16311140e098:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-HStringTemplate
 * [new ref]         a56f6c9ec91f8dd9f7fbfc1e9a1a16311140e098 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a56f6c9 rv64 rebuild