$ git clone -n https://src.fedoraproject.org/rpms/rust-tendril.git /var/lib/mock/f45-build-45345-822/root/chroot_tmpdir/scmroot/rust-tendril
Cloning into '/var/lib/mock/f45-build-45345-822/root/chroot_tmpdir/scmroot/rust-tendril'...
$ git fetch origin 41984c0193e9139fcea2b6ef2dca638d6c1d0a04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tendril
 * [new ref]         41984c0193e9139fcea2b6ef2dca638d6c1d0a04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41984c0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild