$ git clone -n https://src.fedoraproject.org/rpms/jrnl.git /var/lib/mock/f39-build-1761965-41497/root/chroot_tmpdir/scmroot/jrnl
Cloning into '/var/lib/mock/f39-build-1761965-41497/root/chroot_tmpdir/scmroot/jrnl'...
$ git fetch origin 8720c7f7327b6afbf9c1e6841c42ece680d8ed6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jrnl
 * [new ref]         8720c7f7327b6afbf9c1e6841c42ece680d8ed6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8720c7f Update to 4.1 (close RHBZ#2247951)