$ git clone -n https://src.fedoraproject.org/rpms/kmail.git /var/lib/mock/f38-build-717555-96576/root/chroot_tmpdir/scmroot/kmail
Cloning into '/var/lib/mock/f38-build-717555-96576/root/chroot_tmpdir/scmroot/kmail'...
$ git fetch origin 15c13812cb74cd15de3337f986ffdf6965b4341e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmail
 * [new ref]         15c13812cb74cd15de3337f986ffdf6965b4341e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15c1381 23.04.1