$ git clone -n https://src.fedoraproject.org/rpms/pixman.git /var/lib/mock/f39-build-1469441-33848/root/chroot_tmpdir/scmroot/pixman
Cloning into '/var/lib/mock/f39-build-1469441-33848/root/chroot_tmpdir/scmroot/pixman'...
$ git fetch origin c669e649c99e1540a68b6a5150046e9fc06ae7ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pixman
 * [new ref]         c669e649c99e1540a68b6a5150046e9fc06ae7ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c669e64 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild