$ git clone -n https://src.fedoraproject.org/rpms/vsftpd.git /var/lib/mock/f39-build-1453484-32884/root/chroot_tmpdir/scmroot/vsftpd
Cloning into '/var/lib/mock/f39-build-1453484-32884/root/chroot_tmpdir/scmroot/vsftpd'...
$ git fetch origin e4f583e81fda55cd092b506fc61b02874ec24e15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vsftpd
 * [new ref]         e4f583e81fda55cd092b506fc61b02874ec24e15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4f583e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild