$ git clone -n https://src.fedoraproject.org/rpms/rust-system-deps6.git /var/lib/mock/f45-build-35498-695/root/chroot_tmpdir/scmroot/rust-system-deps6
Cloning into '/var/lib/mock/f45-build-35498-695/root/chroot_tmpdir/scmroot/rust-system-deps6'...
$ git fetch origin 488aa710efcd22422b99f24a99f2381b3e9cdaf1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-system-deps6
 * [new ref]         488aa710efcd22422b99f24a99f2381b3e9cdaf1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 488aa71 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild