$ git clone -n https://src.fedoraproject.org/rpms/SDL2.git /var/lib/mock/f41-build-810480-146718/root/chroot_tmpdir/scmroot/SDL2
Cloning into '/var/lib/mock/f41-build-810480-146718/root/chroot_tmpdir/scmroot/SDL2'...
$ git fetch origin 1d9fefed9b9d129c7776451ae93683b82c7cf1d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/SDL2
 * [new ref]         1d9fefed9b9d129c7776451ae93683b82c7cf1d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d9fefe update to 2.30.3, drop BR on libXScrnSaver (thanks to Niels De Graef)