$ git clone -n https://src.fedoraproject.org/rpms/opentoonz.git /var/lib/mock/f40-build-2536452-61850/root/chroot_tmpdir/scmroot/opentoonz
Cloning into '/var/lib/mock/f40-build-2536452-61850/root/chroot_tmpdir/scmroot/opentoonz'...
$ git fetch origin d50ed7d4de36d36d67f2c70308a8bd9e7e730a7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opentoonz
 * [new ref]         d50ed7d4de36d36d67f2c70308a8bd9e7e730a7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d50ed7d Rebuilt for turbojpeg 3.0.2