$ git clone -n https://src.fedoraproject.org/rpms/xmake.git /var/lib/mock/f40-build-2235780-53459/root/chroot_tmpdir/scmroot/xmake
Cloning into '/var/lib/mock/f40-build-2235780-53459/root/chroot_tmpdir/scmroot/xmake'...
$ git fetch origin c3249286143b2c03a297bb6de0e39ced07a434be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmake
 * [new ref]         c3249286143b2c03a297bb6de0e39ced07a434be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c324928 update to 2.8.6