$ git clone -n https://src.fedoraproject.org/rpms/clang17.git /var/lib/mock/f42-build-3421878-45166/root/chroot_tmpdir/scmroot/clang17
Cloning into '/var/lib/mock/f42-build-3421878-45166/root/chroot_tmpdir/scmroot/clang17'...
$ git fetch origin 038fafd53d93c0d2903980df933a631dc6792893:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clang17
 * [new ref]         038fafd53d93c0d2903980df933a631dc6792893 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 038fafd Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild