$ git clone -n https://src.fedoraproject.org/rpms/pam-kwallet.git /var/lib/mock/f42-build-3354858-45022/root/chroot_tmpdir/scmroot/pam-kwallet
Cloning into '/var/lib/mock/f42-build-3354858-45022/root/chroot_tmpdir/scmroot/pam-kwallet'...
$ git fetch origin 2978ea1c0a3c03e73b7a1023ccbf7ce17a1e2ca9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pam-kwallet
 * [new ref]         2978ea1c0a3c03e73b7a1023ccbf7ce17a1e2ca9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2978ea1 6.3.2