$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_spanned0.6.git /var/lib/mock/f45-build-44855-818/root/chroot_tmpdir/scmroot/rust-serde_spanned0.6
Cloning into '/var/lib/mock/f45-build-44855-818/root/chroot_tmpdir/scmroot/rust-serde_spanned0.6'...
$ git fetch origin 7979cd228f13d74b637b7c6e6fcfc2c84bec089d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_spanned0.6
 * [new ref]         7979cd228f13d74b637b7c6e6fcfc2c84bec089d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7979cd2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild