$ git clone -n https://src.fedoraproject.org/rpms/ghc-pcre-light.git /var/lib/mock/f41-build-838886-159867/root/chroot_tmpdir/scmroot/ghc-pcre-light
Cloning into '/var/lib/mock/f41-build-838886-159867/root/chroot_tmpdir/scmroot/ghc-pcre-light'...
$ git fetch origin 2e303350158f291b6a991517cc84d4958d3d2308:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-pcre-light
 * [new ref]         2e303350158f291b6a991517cc84d4958d3d2308 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e30335 https://hackage.haskell.org/package/pcre-light-0.4.1.2/changelog