$ git clone -n https://src.fedoraproject.org/rpms/kalarm.git /var/lib/mock/f39-test-2568103-62206/root/chroot_tmpdir/scmroot/kalarm
Cloning into '/var/lib/mock/f39-test-2568103-62206/root/chroot_tmpdir/scmroot/kalarm'...
$ git fetch origin 5d955cc838879e22ead9a70c1dbeb0c3882ebad8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kalarm
 * [new ref]         5d955cc838879e22ead9a70c1dbeb0c3882ebad8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d955cc Disable rtcwake service in flatpak builds