$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys0.17.git /var/lib/mock/f41-build-side-1-2954348-35544/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys0.17
Cloning into '/var/lib/mock/f41-build-side-1-2954348-35544/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys0.17'...
$ git fetch origin 766fecb74d99deb2f07ef0280b2b42b99ce84f2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys0.17
 * [new ref]         766fecb74d99deb2f07ef0280b2b42b99ce84f2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 766fecb compat package no longer needed