$ git clone -n https://src.fedoraproject.org/rpms/rust-interpolator.git /var/lib/mock/f45-build-42590-795/root/chroot_tmpdir/scmroot/rust-interpolator
Cloning into '/var/lib/mock/f45-build-42590-795/root/chroot_tmpdir/scmroot/rust-interpolator'...
$ git fetch origin f81e91575f7d77380fb2c45f1d359fee59a31602:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-interpolator
 * [new ref]         f81e91575f7d77380fb2c45f1d359fee59a31602 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f81e915 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild