$ git clone -n https://src.fedoraproject.org/rpms/ghc-filepath-bytestring.git /var/lib/mock/f39-build-1508341-35366/root/chroot_tmpdir/scmroot/ghc-filepath-bytestring
Cloning into '/var/lib/mock/f39-build-1508341-35366/root/chroot_tmpdir/scmroot/ghc-filepath-bytestring'...
$ git fetch origin 4b5e42271e8b03c97736d3b8b79e2b1c41228410:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-filepath-bytestring
 * [new ref]         4b5e42271e8b03c97736d3b8b79e2b1c41228410 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b5e422 https://hackage.haskell.org/package/filepath-bytestring-1.4.2.1.13/changelog