$ git clone -n https://src.fedoraproject.org/rpms/kmail.git /var/lib/mock/f42-build-3355536-45025/root/chroot_tmpdir/scmroot/kmail
Cloning into '/var/lib/mock/f42-build-3355536-45025/root/chroot_tmpdir/scmroot/kmail'...
$ git fetch origin 4275778abd9e4944da2d429d6521bb0dade09671:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmail
 * [new ref]         4275778abd9e4944da2d429d6521bb0dade09671 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4275778 24.12.3