$ git clone -n https://src.fedoraproject.org/rpms/pam.git /var/lib/mock/f39-build-1579590-38031/root/chroot_tmpdir/scmroot/pam
Cloning into '/var/lib/mock/f39-build-1579590-38031/root/chroot_tmpdir/scmroot/pam'...
$ git fetch origin ef58d71cf1cf54f366159201c1b9ef6cd9462e2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pam
 * [new ref]         ef58d71cf1cf54f366159201c1b9ef6cd9462e2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef58d71 pam_pwhistory: fix passing NULL filename argument to pwhistory helper