$ git clone -n https://src.fedoraproject.org/rpms/cosmic-screenshot.git /var/lib/mock/f41-build-858092-168310/root/chroot_tmpdir/scmroot/cosmic-screenshot
Cloning into '/var/lib/mock/f41-build-858092-168310/root/chroot_tmpdir/scmroot/cosmic-screenshot'...
$ git fetch origin 346eaf2e0f2adc3c7ad238d4758a276ff4398ea2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-screenshot
 * [new ref]         346eaf2e0f2adc3c7ad238d4758a276ff4398ea2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 346eaf2 "Update to 1.0.0~alpha.2"