$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk-pixbuf0.17.git /var/lib/mock/f40-build-2286770-55718/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf0.17
Cloning into '/var/lib/mock/f40-build-2286770-55718/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf0.17'...
$ git fetch origin 4f714634228f7dffb5c43fee4bbe06281c7c6472:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk-pixbuf0.17
 * [new ref]         4f714634228f7dffb5c43fee4bbe06281c7c6472 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f71463 Initial import (gdk-pixbuf 0.17 compat package)