$ git clone -n https://src.fedoraproject.org/rpms/ghc-prettyprinter.git /var/lib/mock/f41-build-837780-159384/root/chroot_tmpdir/scmroot/ghc-prettyprinter
Cloning into '/var/lib/mock/f41-build-837780-159384/root/chroot_tmpdir/scmroot/ghc-prettyprinter'...
$ git fetch origin 14ca16e7e84dff621cbfd1cd59bca62b4adb96da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-prettyprinter
 * [new ref]         14ca16e7e84dff621cbfd1cd59bca62b4adb96da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14ca16e bump release