$ git clone -n https://src.fedoraproject.org/rpms/wpa_supplicant.git /var/lib/mock/f39-build-1500459-34789/root/chroot_tmpdir/scmroot/wpa_supplicant
Cloning into '/var/lib/mock/f39-build-1500459-34789/root/chroot_tmpdir/scmroot/wpa_supplicant'...
$ git fetch origin a611083073a757598a28df82034b00bdb15b6ff4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wpa_supplicant
 * [new ref]         a611083073a757598a28df82034b00bdb15b6ff4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a611083 defconfig: enable IPv6