$ git clone -n https://src.fedoraproject.org/rpms/rust-eyre.git /var/lib/mock/f40-build-2512857-61714/root/chroot_tmpdir/scmroot/rust-eyre
Cloning into '/var/lib/mock/f40-build-2512857-61714/root/chroot_tmpdir/scmroot/rust-eyre'...
$ git fetch origin 1ecbf272cb30fa38466f7706d1421e381b940a86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-eyre
 * [new ref]         1ecbf272cb30fa38466f7706d1421e381b940a86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ecbf27 Update to version 0.6.12; Fixes RHBZ#2263949