$ git clone -n https://src.fedoraproject.org/rpms/ghc-managed.git /var/lib/mock/f38-build-side-42-init-devel-771318-27758/root/chroot_tmpdir/scmroot/ghc-managed
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-771318-27758/root/chroot_tmpdir/scmroot/ghc-managed'...
$ git fetch origin 192e031dec0acc8b546f895aef61ac2479b40ff5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-managed
 * [new ref]         192e031dec0acc8b546f895aef61ac2479b40ff5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 192e031 Convert to %autorelease and %autochangelog