$ git clone -n https://src.fedoraproject.org/rpms/primesieve.git /var/lib/mock/f39-build-1470163-33882/root/chroot_tmpdir/scmroot/primesieve
Cloning into '/var/lib/mock/f39-build-1470163-33882/root/chroot_tmpdir/scmroot/primesieve'...
$ git fetch origin 0c26e2660f2d7acdead9f5a9a1802b488ef3f872:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/primesieve
 * [new ref]         0c26e2660f2d7acdead9f5a9a1802b488ef3f872 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c26e26 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild