$ git clone -n https://src.fedoraproject.org/rpms/rust-serde-xml-rs0.6.git /var/lib/mock/f45-build-44838-818/root/chroot_tmpdir/scmroot/rust-serde-xml-rs0.6
Cloning into '/var/lib/mock/f45-build-44838-818/root/chroot_tmpdir/scmroot/rust-serde-xml-rs0.6'...
$ git fetch origin d0799076f4f5493bb7207df897f04169434133d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde-xml-rs0.6
 * [new ref]         d0799076f4f5493bb7207df897f04169434133d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d079907 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild