$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gdk.git /var/lib/mock/f41-build-723966-13112/root/chroot_tmpdir/scmroot/ghc-gi-gdk
Cloning into '/var/lib/mock/f41-build-723966-13112/root/chroot_tmpdir/scmroot/ghc-gi-gdk'...
$ git fetch origin 61a1de38f8412cc08f048951f6b12781eccf4b2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gdk
 * [new ref]         61a1de38f8412cc08f048951f6b12781eccf4b2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61a1de3 cabal-rpm-2.1.5