$ git clone -n https://src.fedoraproject.org/rpms/rust-gio0.19.git /var/lib/mock/f41-build-side-1-3006135-36735/root/chroot_tmpdir/scmroot/rust-gio0.19
Cloning into '/var/lib/mock/f41-build-side-1-3006135-36735/root/chroot_tmpdir/scmroot/rust-gio0.19'...
$ git fetch origin 3864cd7cd656ed9bfc08805b265b005a28ee172a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio0.19
 * [new ref]         3864cd7cd656ed9bfc08805b265b005a28ee172a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3864cd7 Initial import (gio 0.19 compat package)