$ git clone -n https://src.fedoraproject.org/rpms/rust-mockall_derive.git /var/lib/mock/f45-build-43239-801/root/chroot_tmpdir/scmroot/rust-mockall_derive
Cloning into '/var/lib/mock/f45-build-43239-801/root/chroot_tmpdir/scmroot/rust-mockall_derive'...
$ git fetch origin 7a6ca1e188cea7fc59fdc434d3813d68da3ed3c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mockall_derive
 * [new ref]         7a6ca1e188cea7fc59fdc434d3813d68da3ed3c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a6ca1e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild