$ git clone -n https://src.fedoraproject.org/rpms/ghc-websockets.git /var/lib/mock/f38-build-side-42-init-devel-922298-28737/root/chroot_tmpdir/scmroot/ghc-websockets
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-922298-28737/root/chroot_tmpdir/scmroot/ghc-websockets'...
$ git fetch origin bebfc22b5f60565e2bd11cf5e0ee3acd119db50e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-websockets
 * [new ref]         bebfc22b5f60565e2bd11cf5e0ee3acd119db50e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bebfc22 Convert to %autorelease and %autochangelog