$ git clone -n https://src.fedoraproject.org/rpms/kalarm.git /var/lib/mock/f40-build-763564-122539/root/chroot_tmpdir/scmroot/kalarm
Cloning into '/var/lib/mock/f40-build-763564-122539/root/chroot_tmpdir/scmroot/kalarm'...
$ git fetch origin 2c979599e6e9840e0cddf111645ea04d792ded06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kalarm
 * [new ref]         2c979599e6e9840e0cddf111645ea04d792ded06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c97959 24.01.80 (+ several tweaks)