$ git clone -n https://src.fedoraproject.org/rpms/rust-cairo-sys-rs0.17.git /var/lib/mock/f38-build-side-43-rust-devel-1421928-31465/root/chroot_tmpdir/scmroot/rust-cairo-sys-rs0.17
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1421928-31465/root/chroot_tmpdir/scmroot/rust-cairo-sys-rs0.17'...
$ git fetch origin ec310cfd3b57eebf2dee4b736e80d31602b11ee2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cairo-sys-rs0.17
 * [new ref]         ec310cfd3b57eebf2dee4b736e80d31602b11ee2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec310cf Initial import (cairo-sys-rs 0.17 compat package)