$ git clone -n https://src.fedoraproject.org/rpms/systemd-bootchart.git /var/lib/mock/f39-build-1862531-42503/root/chroot_tmpdir/scmroot/systemd-bootchart
Cloning into '/var/lib/mock/f39-build-1862531-42503/root/chroot_tmpdir/scmroot/systemd-bootchart'...
$ git fetch origin 19981df98797ca4868365d664972363148464570:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/systemd-bootchart
 * [new ref]         19981df98797ca4868365d664972363148464570 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19981df Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild