$ git clone -n https://src.fedoraproject.org/rpms/rust-data-url.git /var/lib/mock/f45-build-41234-780/root/chroot_tmpdir/scmroot/rust-data-url
Cloning into '/var/lib/mock/f45-build-41234-780/root/chroot_tmpdir/scmroot/rust-data-url'...
$ git fetch origin f152106f324edf89300b327fcafb51156f19056a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-data-url
 * [new ref]         f152106f324edf89300b327fcafb51156f19056a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f152106 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild