$ git clone -n https://src.fedoraproject.org/rpms/libdispatch.git /var/lib/mock/f38-build-side-42-init-devel-844023-28419/root/chroot_tmpdir/scmroot/libdispatch
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-844023-28419/root/chroot_tmpdir/scmroot/libdispatch'...
$ git fetch origin 9c27dc72dd4372c48d92f260b472af918416e28f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdispatch
 * [new ref]         9c27dc72dd4372c48d92f260b472af918416e28f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c27dc7 Updated to 5.7.3-RELEASE