$ git clone -n https://src.fedoraproject.org/rpms/tuxpaint.git /var/lib/mock/f40-build-799119-142144/root/chroot_tmpdir/scmroot/tuxpaint
Cloning into '/var/lib/mock/f40-build-799119-142144/root/chroot_tmpdir/scmroot/tuxpaint'...
$ git fetch origin 8c007a34f05bef54552a71a9319a4b0441c99894:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tuxpaint
 * [new ref]         8c007a34f05bef54552a71a9319a4b0441c99894 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c007a3 SDL2_Pango rebuild