$ git clone -n https://src.fedoraproject.org/rpms/rust-sscanf_macro.git /var/lib/mock/f45-build-45185-821/root/chroot_tmpdir/scmroot/rust-sscanf_macro
Cloning into '/var/lib/mock/f45-build-45185-821/root/chroot_tmpdir/scmroot/rust-sscanf_macro'...
$ git fetch origin 7f1de2e24dfc87ee87f33538b10338e2f7f9feb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sscanf_macro
 * [new ref]         7f1de2e24dfc87ee87f33538b10338e2f7f9feb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f1de2e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild