$ git clone -n https://src.fedoraproject.org/rpms/ktimer.git /var/lib/mock/f40-build-1936856-25145/root/chroot_tmpdir/scmroot/ktimer
Cloning into '/var/lib/mock/f40-build-1936856-25145/root/chroot_tmpdir/scmroot/ktimer'...
$ git fetch origin 4f6f3b8ae310dd62d8e2f6bc8fb21ca16525343c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ktimer
 * [new ref]         4f6f3b8ae310dd62d8e2f6bc8fb21ca16525343c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f6f3b8 24.05.2