$ git clone -n https://src.fedoraproject.org/rpms/xmedcon.git /var/lib/mock/f39-build-1533318-36227/root/chroot_tmpdir/scmroot/xmedcon
Cloning into '/var/lib/mock/f39-build-1533318-36227/root/chroot_tmpdir/scmroot/xmedcon'...
$ git fetch origin 131f6a66bebffb59306534595ddf02f680f3fc2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmedcon
 * [new ref]         131f6a66bebffb59306534595ddf02f680f3fc2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 131f6a6 update to xmedcon-0.23.0 fixes rhbz#2159591