$ git clone -n https://src.fedoraproject.org/rpms/rust-getrandom0.2.git /var/lib/mock/f45-build-41852-786/root/chroot_tmpdir/scmroot/rust-getrandom0.2
Cloning into '/var/lib/mock/f45-build-41852-786/root/chroot_tmpdir/scmroot/rust-getrandom0.2'...
$ git fetch origin 72f5270f08030d48e29962d319c89d9dd21ce8d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-getrandom0.2
 * [new ref]         72f5270f08030d48e29962d319c89d9dd21ce8d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72f5270 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild