$ git clone -n https://src.fedoraproject.org/rpms/rust-trim-in-place.git /var/lib/mock/f45-build-45752-825/root/chroot_tmpdir/scmroot/rust-trim-in-place
Cloning into '/var/lib/mock/f45-build-45752-825/root/chroot_tmpdir/scmroot/rust-trim-in-place'...
$ git fetch origin aaeb843e0f9a427feaf110a769e7dea5dac8add2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-trim-in-place
 * [new ref]         aaeb843e0f9a427feaf110a769e7dea5dac8add2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aaeb843 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild