$ git clone -n https://src.fedoraproject.org/rpms/rust-euclid.git /var/lib/mock/f45-build-41589-784/root/chroot_tmpdir/scmroot/rust-euclid
Cloning into '/var/lib/mock/f45-build-41589-784/root/chroot_tmpdir/scmroot/rust-euclid'...
$ git fetch origin df97bb40fb35fbcbf89865c71aaa77f6794125ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-euclid
 * [new ref]         df97bb40fb35fbcbf89865c71aaa77f6794125ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df97bb4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild