$ git clone -n https://src.fedoraproject.org/rpms/kcron.git /var/lib/mock/f40-build-2152831-50913/root/chroot_tmpdir/scmroot/kcron
Cloning into '/var/lib/mock/f40-build-2152831-50913/root/chroot_tmpdir/scmroot/kcron'...
$ git fetch origin 0ff6aa7adf8f1540b411110957a2e5c5a341159d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcron
 * [new ref]         0ff6aa7adf8f1540b411110957a2e5c5a341159d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ff6aa7 24.01.85