$ git clone -n https://src.fedoraproject.org/rpms/ghc-xmonad-contrib.git /var/lib/mock/f38-build-side-42-init-devel-917995-28734/root/chroot_tmpdir/scmroot/ghc-xmonad-contrib
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-917995-28734/root/chroot_tmpdir/scmroot/ghc-xmonad-contrib'...
$ git fetch origin 971f8ca60dae93ee08912ebe974d13eef0f948e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-xmonad-contrib
 * [new ref]         971f8ca60dae93ee08912ebe974d13eef0f948e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 971f8ca Convert to %autorelease and %autochangelog