$ git clone -n https://src.fedoraproject.org/rpms/openmsx.git /var/lib/mock/f42-build-868820-176267/root/chroot_tmpdir/scmroot/openmsx
Cloning into '/var/lib/mock/f42-build-868820-176267/root/chroot_tmpdir/scmroot/openmsx'...
$ git fetch origin 31bde38e8de28a9d7eb3947bc0deeb0fa047bb67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openmsx
 * [new ref]         31bde38e8de28a9d7eb3947bc0deeb0fa047bb67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31bde38 OpenMSX does not build with Tcl 9.0 (BZ #2337744)