$ git clone -n https://src.fedoraproject.org/rpms/dpkg.git /var/lib/mock/f41-build-side-1-3049461-37888/root/chroot_tmpdir/scmroot/dpkg
Cloning into '/var/lib/mock/f41-build-side-1-3049461-37888/root/chroot_tmpdir/scmroot/dpkg'...
$ git fetch origin 6ed07c6cb6cb4e219dfd9c13d6b1843cc3123937:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dpkg
 * [new ref]         6ed07c6cb6cb4e219dfd9c13d6b1843cc3123937 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ed07c6 update .gitignore with dpkg_1.22.6.tar.xz