$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-url.git /var/lib/mock/f39-build-2226745-52967/root/chroot_tmpdir/scmroot/ghc-url
Cloning into '/var/lib/mock/f39-build-2226745-52967/root/chroot_tmpdir/scmroot/ghc-url'...
$ git fetch origin df2d8aab6f4b2c5bf093e6c914a2ac3727ae5810:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-url
 * [new ref]         df2d8aab6f4b2c5bf093e6c914a2ac3727ae5810 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df2d8aa rv64 rebuild