$ git clone -n https://src.fedoraproject.org/rpms/kalarm.git /var/lib/mock/f39-build-2531645-61806/root/chroot_tmpdir/scmroot/kalarm
Cloning into '/var/lib/mock/f39-build-2531645-61806/root/chroot_tmpdir/scmroot/kalarm'...
$ git fetch origin 6c4cbb69700af1f47118be1b87fd6900d1f9b2c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kalarm
 * [new ref]         6c4cbb69700af1f47118be1b87fd6900d1f9b2c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c4cbb6 23.08.5