$ git clone -n https://src.fedoraproject.org/rpms/ghc-X11.git /var/lib/mock/f41-build-837901-159471/root/chroot_tmpdir/scmroot/ghc-X11
Cloning into '/var/lib/mock/f41-build-837901-159471/root/chroot_tmpdir/scmroot/ghc-X11'...
$ git fetch origin f62ce0934fa0fa5c78849e5871a38d2cded0aa78:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-X11
 * [new ref]         f62ce0934fa0fa5c78849e5871a38d2cded0aa78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f62ce09 bump release