$ git clone -n https://src.fedoraproject.org/rpms/rust-cairo-sys-rs0.17.git /var/lib/mock/f41-build-side-1-2923662-34982/root/chroot_tmpdir/scmroot/rust-cairo-sys-rs0.17
Cloning into '/var/lib/mock/f41-build-side-1-2923662-34982/root/chroot_tmpdir/scmroot/rust-cairo-sys-rs0.17'...
$ git fetch origin 4e9d29ed82f20a98ffd2f4e9c1f6173608400ea7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cairo-sys-rs0.17
 * [new ref]         4e9d29ed82f20a98ffd2f4e9c1f6173608400ea7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e9d29e compat package no longer needed