$ git clone -n https://src.fedoraproject.org/rpms/ghc-pretty-show.git /var/lib/mock/f45-build-10621-419/root/chroot_tmpdir/scmroot/ghc-pretty-show
Cloning into '/var/lib/mock/f45-build-10621-419/root/chroot_tmpdir/scmroot/ghc-pretty-show'...
$ git fetch origin 3ad22614b51a88ab59ca7d522d8677021a04f8a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-pretty-show
 * [new ref]         3ad22614b51a88ab59ca7d522d8677021a04f8a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ad2261 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild