$ git clone -n https://src.fedoraproject.org/rpms/python-cramjam.git /var/lib/mock/f42-build-side-1-3583684-46890/root/chroot_tmpdir/scmroot/python-cramjam
Cloning into '/var/lib/mock/f42-build-side-1-3583684-46890/root/chroot_tmpdir/scmroot/python-cramjam'...
$ git fetch origin 7e7726133ccc6bc36ff0c7f23c87da99daa51589:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-cramjam
 * [new ref]         7e7726133ccc6bc36ff0c7f23c87da99daa51589 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e77261 Report and skip test that fails with miniz_oxide>0.8.5