$ git clone -n https://src.fedoraproject.org/rpms/kf5-mailcommon.git /var/lib/mock/f38-build-729634-101821/root/chroot_tmpdir/scmroot/kf5-mailcommon
Cloning into '/var/lib/mock/f38-build-729634-101821/root/chroot_tmpdir/scmroot/kf5-mailcommon'...
$ git fetch origin af5c7afe51d282c4fb63d7c92b04f6a17dea5b17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-mailcommon
 * [new ref]         af5c7afe51d282c4fb63d7c92b04f6a17dea5b17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af5c7af 23.04.2