$ git clone -n https://src.fedoraproject.org/rpms/mailcommon.git /var/lib/mock/f41-build-858318-168340/root/chroot_tmpdir/scmroot/mailcommon
Cloning into '/var/lib/mock/f41-build-858318-168340/root/chroot_tmpdir/scmroot/mailcommon'...
$ git fetch origin 91c52ed0f54dcae9d47c27218891c78156a210f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mailcommon
 * [new ref]         91c52ed0f54dcae9d47c27218891c78156a210f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91c52ed 24.08.2