$ git clone -n https://src.fedoraproject.org/rpms/openxr-explorer.git /var/lib/mock/f42-build-side-1-3537754-46560/root/chroot_tmpdir/scmroot/openxr-explorer
Cloning into '/var/lib/mock/f42-build-side-1-3537754-46560/root/chroot_tmpdir/scmroot/openxr-explorer'...
$ git fetch origin 1c3fb6718487821a61a8644d6c6a2961b8026468:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openxr-explorer
 * [new ref]         1c3fb6718487821a61a8644d6c6a2961b8026468 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c3fb67 Update to 1.7 (fedora#2368689).