$ git clone -n https://src.fedoraproject.org/rpms/ghc-shelly.git /var/lib/mock/f38-build-side-42-init-devel-633135-26381/root/chroot_tmpdir/scmroot/ghc-shelly
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-633135-26381/root/chroot_tmpdir/scmroot/ghc-shelly'...
$ git fetch origin b2e1eaf39d57a4d5c5ff583ef880e9f57c6bf03d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-shelly
 * [new ref]         b2e1eaf39d57a4d5c5ff583ef880e9f57c6bf03d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2e1eaf update to 1.10.0