$ git clone -n https://src.fedoraproject.org/rpms/rust-rand_xorshift0.4.git /var/lib/mock/f45-build-44267-812/root/chroot_tmpdir/scmroot/rust-rand_xorshift0.4
Cloning into '/var/lib/mock/f45-build-44267-812/root/chroot_tmpdir/scmroot/rust-rand_xorshift0.4'...
$ git fetch origin fa1d84db3143aa64f6457c8f1eb7dd6ac0e327c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rand_xorshift0.4
 * [new ref]         fa1d84db3143aa64f6457c8f1eb7dd6ac0e327c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa1d84d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild